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How does Minus7 technology work?

https://youtube.com/watch?v=8WZKQYq9Ffo%26%3Fvq%3Dhd1080

Minus 7 Tackling Fuel Povery - Renewable Energy

https://youtube.com/watch?v=49X4fKELT6A%26%3Fvq%3Dhd1080

How does Minus7 technology work?

https://youtube.com/watch?v=asvDdCFxULk%26%3Fvq%3Dhd1080
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